Hi, we are in the testing stage of your fine product and the only slight drawback is that the NEW MAILING form is missing a way to enter a custom RETURN PATH.
It is useful for when we send e-mails for clients that do not host on our server and the return-path header gets automatically populated with the From: input box text and this causes the newsletter not being delivered to the servers that use SPF.

Please let us know if there is any way how to get selectable/customisable return path working with openEMM,